AP Stats-CH 4: Identifying Sampling Methods

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What is Cluster Sampling?

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A sampling method where entire groups (clusters) are randomly selected, and all individuals within those groups are surveyed.

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What is Simple Random Sampling (SRS)?

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A sampling method where every individual has an equal chance of being selected, typically achieved through random selection.

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What is Systematic Sampling?

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A sampling method where individuals are selected at regular intervals from a randomly ordered list.

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What is Stratified Sampling?

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A sampling method that involves dividing the population into subgroups (strata) and randomly sampling from each stratum.

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What is Voluntary Response Sampling?

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A sampling method where individuals choose to participate, often leading to biased results.

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Example of Cluster Sampling:

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A study selects 10 schools from a district and surveys all students in those schools.

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Example of Simple Random Sampling:

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A lottery system where names are drawn randomly from a hat.

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Example of Systematic Sampling:

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Selecting every 10th person from a list of registered voters.

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Example of Stratified Sampling:

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Dividing a population of students by grade level and randomly selecting students from each grade.

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Example of Voluntary Response Sampling:

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A survey posted online where anyone can choose to respond.